Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
phong cong » phong chong, thong cong, chong cong
hoc chieu » hoc thieu, ho chieu, hoc hien
va phong » van phong, va phuong, va thong
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - ((canh tranh) or (thanh trung)) va phong cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((canh tranh) OR (thanh trung)) va phong cong san than cau*.